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030c04c9ea
This adds support to display vertices lines over the profile graph to display indicator at the location of the curve's vertices. This is achieved with mainly 2 changes: - `QgsProfilePlotRenderer::setSubsectionsSymbol()` allows to set the line symbol of the vertical lines - `renderSubsectionsIndicator` generates and renders the vertical lines. It is called by `QgsProfilePlotRenderer::renderToImage()`.